https://boeing.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
60
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
FCO2 Per Page LoadAction3.92g CO2 per viewFIX
CO2 Per Page Load
Action3.92g CO2 per view
3.92g CO2 per view
Critical::
3.92g CO2 per page view
This page transfers 13.8 MB, producing an estimated 3.92g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.73g, network 0.68g, end-user device 2.52g.
Got: 3.92g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 470.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 470.2 kg of CO2 annually — equivalent to charging 58777 smartphones.
3.92g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 13.8 MB
Your site
3.92g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.73g
Network
0.68g
End-user device
2.52g
At 10,000 monthly views: Monthly: 39.2 kg · Annual: 470.2 kg · ≈ 58777 smartphone charges
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
Info::
Green hosting status based on known provider commitments
Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.
Green HostingNot Green Hosted
Hosting Amazon Web Services✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
3.92g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
3.92g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 553% more
vs Target 684% more
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 32 KB (vs 14168 KB first visit). 115 of 116 resources are served from browser cache, saving 3.91g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 3.92g)
First visit
14168 KB
Repeat visit
32 KB
100% reduction on repeat visits
Saving 3.91g CO2 per returning visitor
115 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency97% efficientPASS
Transfer Efficiency
97% efficient
97% efficient
Info::
Transfer efficiency: 97%
Only 462 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 462 KB (3% of page weight)
Unused JS 462 KB
0.13g unnecessary CO2 per visit
Actual transfer 14168 KB
Theoretical minimum 13706 KB
Potential savings 462 KB (0.13g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization75 images, 5872 KB total, 307 KB wastedINFO
Image Optimization
75 images, 5872 KB total, 307 KB wasted
Image Optimization Audit
Total Images
75
Total Size
5872 KB
Oversized
2
Wasted
307 KB
7 missing alt text 19 missing dimensions 6 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.